GitLab: Allow fetching events

Projects that are linked to a GitLab instance will now fetch
notifications for this project and print them to the vcs output pane.

Change-Id: Ifb960e64b30a260327efb28a3dfd26f6457503a0
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: David Schulz <david.schulz@qt.io>

8 files changed, 294 insertions, 3 deletions

diff --git a/src/plugins/gitlab/gitlabplugin.cpp b/src/plugins/gitlab/gitlabplugin.cpp
index 2a4dd7c69d..5df45c8e68 100644
--- a/src/plugins/gitlab/gitlabplugin.cpp
+++ b/src/plugins/gitlab/gitlabplugin.cpp
@@ -29,6 +29,8 @@
 #include "gitlaboptionspage.h"
 #include "gitlabparameters.h"
 #include "gitlabprojectsettings.h"
+#include "queryrunner.h"
+#include "resultparser.h"
 
 #include <coreplugin/actionmanager/actioncontainer.h>
 #include <coreplugin/actionmanager/actionmanager.h>
@@ -36,24 +38,39 @@
 #include <git/gitplugin.h>
 #include <projectexplorer/project.h>
 #include <projectexplorer/projectpanelfactory.h>
+#include <projectexplorer/session.h>
 #include <utils/qtcassert.h>
+#include <vcsbase/vcsoutputwindow.h>
 
 #include <QAction>
 #include <QMessageBox>
 #include <QPointer>
+#include <QTimer>
 
 namespace GitLab {
 namespace Constants {
 const char GITLAB_OPEN_VIEW[] = "GitLab.OpenView";
 } // namespace Constants
 
-class GitLabPluginPrivate
+class GitLabPluginPrivate : public QObject
 {
 public:
     GitLabParameters parameters;
     GitLabOptionsPage optionsPage{&parameters};
     QHash<ProjectExplorer::Project *, GitLabProjectSettings *> projectSettings;
     QPointer<GitLabDialog> dialog;
+
+    QTimer notificationTimer;
+    QString projectName;
+    Utils::Id serverId;
+    bool runningQuery = false;
+
+    void setupNotificationTimer();
+    void fetchEvents();
+    void fetchUser();
+    void createAndSendEventsRequest(const QDateTime timeStamp, int page = -1);
+    void handleUser(const User &user);
+    void handleEvents(const Events &events, const QDateTime &timeStamp);
 };
 
 static GitLabPluginPrivate *dd = nullptr;
@@ -93,6 +110,9 @@ bool GitLabPlugin::initialize(const QStringList & /*arguments*/, QString * /*err
         if (dd->dialog)
             dd->dialog->updateRemotes();
     });
+    connect(ProjectExplorer::SessionManager::instance(),
+            &ProjectExplorer::SessionManager::startupProjectChanged,
+            this, &GitLabPlugin::onStartupProjectChanged);
     return true;
 }
 
@@ -119,6 +139,141 @@ void GitLabPlugin::openView()
     dd->dialog->raise();
 }
 
+void GitLabPlugin::onStartupProjectChanged()
+{
+    QTC_ASSERT(dd, return);
+    disconnect(&dd->notificationTimer);
+    ProjectExplorer::Project *project = ProjectExplorer::SessionManager::startupProject();
+    if (!project) {
+        dd->notificationTimer.stop();
+        return;
+    }
+
+    const GitLabProjectSettings *projSettings = projectSettings(project);
+    if (!projSettings->isLinked()) {
+        dd->notificationTimer.stop();
+        return;
+    }
+
+    dd->fetchEvents();
+    dd->setupNotificationTimer();
+}
+
+void GitLabPluginPrivate::setupNotificationTimer()
+{
+    // make interval configurable?
+    notificationTimer.setInterval(15 * 60 * 1000);
+    QObject::connect(&notificationTimer, &QTimer::timeout, this, &GitLabPluginPrivate::fetchEvents);
+    notificationTimer.start();
+}
+
+void GitLabPluginPrivate::fetchEvents()
+{
+    ProjectExplorer::Project *project = ProjectExplorer::SessionManager::startupProject();
+    QTC_ASSERT(project, return);
+
+    if (runningQuery)
+        return;
+
+    const GitLabProjectSettings *projSettings = GitLabPlugin::projectSettings(project);
+    projectName = projSettings->currentProject();
+    serverId = projSettings->currentServer();
+
+    const QDateTime lastRequest = projSettings->lastRequest();
+    if (!lastRequest.isValid()) { // we haven't queried events for this project yet
+        fetchUser();
+        return;
+    }
+    createAndSendEventsRequest(lastRequest);
+}
+
+void GitLabPluginPrivate::fetchUser()
+{
+    if (runningQuery)
+        return;
+
+    const Query query(Query::User);
+    QueryRunner *runner = new QueryRunner(query, serverId, this);
+    QObject::connect(runner, &QueryRunner::resultRetrieved, this, [this](const QByteArray &result) {
+        handleUser(ResultParser::parseUser(result));
+    });
+    QObject::connect(runner, &QueryRunner::finished, [runner]() { runner->deleteLater(); });
+    runningQuery = true;
+    runner->start();
+}
+
+void GitLabPluginPrivate::createAndSendEventsRequest(const QDateTime timeStamp, int page)
+{
+    if (runningQuery)
+        return;
+
+    Query query(Query::Events, {projectName});
+    QStringList additional = {"sort=asc"};
+
+    QDateTime after = timeStamp.addDays(-1);
+    additional.append(QLatin1String("after=%1").arg(after.toString("yyyy-MM-dd")));
+    query.setAdditionalParameters(additional);
+
+    if (page > 1)
+        query.setPageParameter(page);
+
+    QueryRunner *runner = new QueryRunner(query, serverId, this);
+    QObject::connect(runner, &QueryRunner::resultRetrieved, this,
+                     [this, timeStamp](const QByteArray &result) {
+        handleEvents(ResultParser::parseEvents(result), timeStamp);
+    });
+    QObject::connect(runner, &QueryRunner::finished, [runner]() { runner->deleteLater(); });
+    runningQuery = true;
+    runner->start();
+}
+
+void GitLabPluginPrivate::handleUser(const User &user)
+{
+    runningQuery = false;
+
+    QTC_ASSERT(user.error.message.isEmpty(), return);
+    const QDateTime timeStamp = QDateTime::fromString(user.lastLogin, Qt::ISODateWithMs);
+    createAndSendEventsRequest(timeStamp);
+}
+
+void GitLabPluginPrivate::handleEvents(const Events &events, const QDateTime &timeStamp)
+{
+    runningQuery = false;
+
+    ProjectExplorer::Project *project = ProjectExplorer::SessionManager::startupProject();
+    QTC_ASSERT(project, return);
+
+    GitLabProjectSettings *projSettings = GitLabPlugin::projectSettings(project);
+    QTC_ASSERT(projSettings->currentProject() == projectName, return);
+
+    if (!projSettings->isLinked()) // link state has changed meanwhile - ignore the request
+        return;
+
+    if (!events.error.message.isEmpty()) {
+        VcsBase::VcsOutputWindow::appendError("GitLab: Error while fetching events. "
+                                              + events.error.message + '\n');
+        return;
+    }
+
+    QDateTime lastTimeStamp;
+    for (const Event &event : events.events) {
+        const QDateTime eventTimeStamp = QDateTime::fromString(event.timeStamp, Qt::ISODateWithMs);
+        if (!timeStamp.isValid() || timeStamp < eventTimeStamp) {
+            VcsBase::VcsOutputWindow::appendMessage("GitLab: " + event.toMessage());
+            if (!lastTimeStamp.isValid() || lastTimeStamp < eventTimeStamp)
+                lastTimeStamp = eventTimeStamp;
+        }
+    }
+    if (lastTimeStamp.isValid()) {
+        if (auto outputWindow = VcsBase::VcsOutputWindow::instance())
+            outputWindow->flash();
+        projSettings->setLastRequest(lastTimeStamp);
+    }
+
+    if (events.pageInfo.currentPage < events.pageInfo.totalPages)
+        createAndSendEventsRequest(timeStamp, events.pageInfo.currentPage + 1);
+}
+
 QList<GitLabServer> GitLabPlugin::allGitLabServers()
 {
     QTC_ASSERT(dd, return {});
@@ -152,4 +307,28 @@ GitLabOptionsPage *GitLabPlugin::optionsPage()
     return &dd->optionsPage;
 }
 
+void GitLabPlugin::linkedStateChanged(bool enabled)
+{
+    QTC_ASSERT(dd, return);
+
+    ProjectExplorer::Project *project = ProjectExplorer::SessionManager::startupProject();
+    if (project) {
+        const GitLabProjectSettings *pSettings = projectSettings(project);
+        dd->serverId = pSettings->currentServer();
+        dd->projectName = pSettings->currentProject();
+    } else {
+        dd->serverId = Utils::Id();
+        dd->projectName = QString();
+    }
+
+    if (enabled) {
+        dd->fetchEvents();
+        dd->setupNotificationTimer();
+    } else {
+        QObject::disconnect(&dd->notificationTimer, &QTimer::timeout,
+                            dd, &GitLabPluginPrivate::fetchEvents);
+        dd->notificationTimer.stop();
+    }
+}
+
 } // namespace GitLab
diff --git a/src/plugins/gitlab/gitlabplugin.h b/src/plugins/gitlab/gitlabplugin.h
index 14368ef29f..f1abf1bd1e 100644
--- a/src/plugins/gitlab/gitlabplugin.h
+++ b/src/plugins/gitlab/gitlabplugin.h
@@ -33,6 +33,7 @@ namespace ProjectExplorer { class Project; }
 
 namespace GitLab {
 
+class Events;
 class GitLabProjectSettings;
 class GitLabOptionsPage;
 
@@ -53,8 +54,10 @@ public:
     static GitLabProjectSettings *projectSettings(ProjectExplorer::Project *project);
     static GitLabOptionsPage *optionsPage();
 
+    static void linkedStateChanged(bool enabled);
 private:
     void openView();
+    void onStartupProjectChanged();
 };
 
 } // namespace GitLab
diff --git a/src/plugins/gitlab/gitlabprojectsettings.cpp b/src/plugins/gitlab/gitlabprojectsettings.cpp
index 22921e229d..e24b469982 100644
--- a/src/plugins/gitlab/gitlabprojectsettings.cpp
+++ b/src/plugins/gitlab/gitlabprojectsettings.cpp
@@ -49,6 +49,7 @@ namespace GitLab {
 const char PSK_LINKED_ID[]  = "GitLab.LinkedId";
 const char PSK_SERVER[]     = "GitLab.Server";
 const char PSK_PROJECT[]    = "GitLab.Project";
+const char PSK_LAST_REQ[]   = "GitLab.LastRequest";
 
 static QString accessLevelString(int accessLevel)
 {
@@ -106,6 +107,7 @@ void GitLabProjectSettings::load()
     m_id = Utils::Id::fromSetting(m_project->namedSettings(PSK_LINKED_ID));
     m_host = m_project->namedSettings(PSK_SERVER).toString();
     m_currentProject = m_project->namedSettings(PSK_PROJECT).toString();
+    m_lastRequest = m_project->namedSettings(PSK_LAST_REQ).toDateTime();
 
     // may still be wrong, but we avoid an additional request by just doing sanity check here
     if (!m_id.isValid() || m_host.isEmpty())
@@ -124,6 +126,7 @@ void GitLabProjectSettings::save()
         m_project->setNamedSettings(PSK_SERVER, QString());
     }
     m_project->setNamedSettings(PSK_PROJECT, m_currentProject);
+    m_project->setNamedSettings(PSK_LAST_REQ, m_lastRequest);
 }
 
 GitLabProjectSettingsWidget::GitLabProjectSettingsWidget(ProjectExplorer::Project *project,
@@ -184,6 +187,7 @@ void GitLabProjectSettingsWidget::unlink()
     m_projectSettings->setLinked(false);
     m_projectSettings->setCurrentProject({});
     updateEnabledStates();
+    GitLabPlugin::linkedStateChanged(false);
 }
 
 void GitLabProjectSettingsWidget::checkConnection(CheckMode mode)
@@ -245,6 +249,7 @@ void GitLabProjectSettingsWidget::onConnectionChecked(const Project &project,
         m_projectSettings->setCurrentServerHost(remote);
         m_projectSettings->setLinked(true);
         m_projectSettings->setCurrentProject(projectName);
+        GitLabPlugin::linkedStateChanged(true);
     }
     updateEnabledStates();
 }
@@ -282,8 +287,10 @@ void GitLabProjectSettingsWidget::updateUi()
             m_hostCB->setCurrentIndex(m_hostCB->findData(QVariant::fromValue(serverHost)));
             m_linkedGitLabServer->setCurrentIndex(
                         m_linkedGitLabServer->findData(QVariant::fromValue(server)));
+            GitLabPlugin::linkedStateChanged(true);
         } else {
             m_projectSettings->setLinked(false);
+            GitLabPlugin::linkedStateChanged(false);
         }
     }
     updateEnabledStates();
diff --git a/src/plugins/gitlab/gitlabprojectsettings.h b/src/plugins/gitlab/gitlabprojectsettings.h
index de8bdb851d..5a9081adc7 100644
--- a/src/plugins/gitlab/gitlabprojectsettings.h
+++ b/src/plugins/gitlab/gitlabprojectsettings.h
@@ -28,6 +28,7 @@
 #include <projectexplorer/projectsettingswidget.h>
 #include <utils/id.h>
 
+#include <QDateTime>
 #include <QObject>
 #include <QWidget>
 
@@ -59,9 +60,12 @@ public:
     QString currentProject() const { return m_currentProject; }
     bool isLinked() const { return m_linked; }
     void setLinked(bool linked);
+    QDateTime lastRequest() const { return m_lastRequest; }
+    void setLastRequest(const QDateTime &lastRequest) { m_lastRequest = lastRequest; }
     ProjectExplorer::Project *project() const { return m_project; }
 
     static std::tuple<QString, QString, int> remotePartsFromRemote(const QString &remote);
+
 private:
     void load();
     void save();
@@ -69,6 +73,7 @@ private:
     ProjectExplorer::Project *m_project = nullptr;
     QString m_host;
     Utils::Id m_id;
+    QDateTime m_lastRequest;
     QString m_currentProject;
     bool m_linked = false;
 };
diff --git a/src/plugins/gitlab/queryrunner.cpp b/src/plugins/gitlab/queryrunner.cpp
index e0369d78c5..86ad6b303a 100644
--- a/src/plugins/gitlab/queryrunner.cpp
+++ b/src/plugins/gitlab/queryrunner.cpp
@@ -43,6 +43,7 @@ const char API_PREFIX[]                 = "/api/v4";
 const char QUERY_PROJECT[]              = "/projects/%1";
 const char QUERY_PROJECTS[]             = "/projects?simple=true";
 const char QUERY_USER[]                 = "/user";
+const char QUERY_EVENTS[]               = "/projects/%1/events";
 
 Query::Query(Type type, const QStringList &parameter)
     : m_type(type)
@@ -62,7 +63,7 @@ void Query::setAdditionalParameters(const QStringList &additional)
 
 bool Query::hasPaginatedResults() const
 {
-    return m_type == Query::Projects;
+    return m_type == Query::Projects || m_type == Query::Events;
 }
 
 QString Query::toString() const
@@ -82,6 +83,11 @@ QString Query::toString() const
     case Query::User:
         query += QUERY_USER;
         break;
+    case Query::Events:
+        QTC_ASSERT(!m_parameter.isEmpty(), return {});
+        query += QLatin1String(QUERY_EVENTS).arg(QLatin1String(
+                                                     QUrl::toPercentEncoding(m_parameter.at(0))));
+        break;
     }
     if (m_pageParameter > 0) {
         query.append(m_type == Query::Projects ? '&' : '?');
diff --git a/src/plugins/gitlab/queryrunner.h b/src/plugins/gitlab/queryrunner.h
index a431921ab7..ead892f55d 100644
--- a/src/plugins/gitlab/queryrunner.h
+++ b/src/plugins/gitlab/queryrunner.h
@@ -40,7 +40,8 @@ public:
         NoQuery,
         User,
         Project,
-        Projects
+        Projects,
+        Events
     };
 
     explicit Query(Type type, const QStringList &parameters = {});
diff --git a/src/plugins/gitlab/resultparser.cpp b/src/plugins/gitlab/resultparser.cpp
index 7fb5db8d2f..e9ce0d7083 100644
--- a/src/plugins/gitlab/resultparser.cpp
+++ b/src/plugins/gitlab/resultparser.cpp
@@ -32,6 +32,25 @@
 #include <utility>
 
 namespace GitLab {
+
+
+QString Event::toMessage() const
+{
+    QString message;
+    if (author.realname.isEmpty())
+        message.append(author.name);
+    else
+        message.append(author.realname + " (" + author.name + ')');
+    message.append(' ');
+    if (!pushData.isEmpty())
+        message.append(pushData);
+    else if (!targetTitle.isEmpty())
+        message.append(action + ' ' + targetType + " '" + targetTitle +'\'');
+    else
+        message.append(action + ' ' + targetType);
+    return message;
+}
+
 namespace ResultParser {
 
 static PageInformation paginationInformation(const QByteArray &header)
@@ -133,6 +152,7 @@ static User userFromJson(const QJsonObject &jsonObj)
     user.realname = jsonObj.value("name").toString();
     user.id = jsonObj.value("id").toInt(-1);
     user.email = jsonObj.value("email").toString();
+    user.lastLogin = jsonObj.value("last_sign_in_at").toString();
     user.bot = jsonObj.value("bot").toBool();
     return user;
 }
@@ -162,6 +182,31 @@ static Project projectFromJson(const QJsonObject &jsonObj)
     return project;
 }
 
+static Event eventFromJson(const QJsonObject &jsonObj)
+{
+    Event event;
+    event.action = jsonObj.value("action_name").toString();
+    const QJsonValue value = jsonObj.value("target_type");
+    event.targetType = value.isNull() ? "project" : jsonObj.value("target_type").toString();
+    if (event.targetType == "DiffNote") {
+        const QJsonObject noteObject = jsonObj.value("note").toObject();
+        event.targetType = noteObject.value("noteable_type").toString();
+    }
+    event.targetTitle = jsonObj.value("target_title").toString();
+    event.author = userFromJson(jsonObj.value("author").toObject());
+    event.timeStamp = jsonObj.value("created_at").toString();
+    if (jsonObj.contains("push_data")) {
+        const QJsonObject pushDataObj = jsonObj.value("push_data").toObject();
+        if (!pushDataObj.isEmpty()) {
+            const QString action = pushDataObj.value("action").toString();
+            const QString ref = pushDataObj.value("ref").toString();
+            const QString refType = pushDataObj.value("ref_type").toString();
+            event.pushData = action + ' ' + refType + " '" + ref + '\'';
+        }
+     }
+    return event;
+}
+
 User parseUser(const QByteArray &input)
 {
     auto [error, userObj] = preHandleSingle(input);
@@ -204,6 +249,27 @@ Projects parseProjects(const QByteArray &input)
     return result;
 }
 
+Events parseEvents(const QByteArray &input)
+{
+    auto [header, json] = splitHeaderAndBody(input);
+    auto [error, jsonDoc] = preHandleHeaderAndBody(header, json);
+    Events result;
+    if (!error.message.isEmpty()) {
+        result.error = error;
+        return result;
+    }
+    result.pageInfo = paginationInformation(header);
+    const QJsonArray eventsArray = jsonDoc.array();
+    for (const QJsonValue &value : eventsArray) {
+        if (!value.isObject())
+            continue;
+        const QJsonObject eventObj = value.toObject();
+        result.events.append(eventFromJson(eventObj));
+    }
+    return result;
+
+}
+
 Error parseErrorMessage(const QString &message)
 {
     Error error;
diff --git a/src/plugins/gitlab/resultparser.h b/src/plugins/gitlab/resultparser.h
index 7c71b5c6d1..aeaeeadcc5 100644
--- a/src/plugins/gitlab/resultparser.h
+++ b/src/plugins/gitlab/resultparser.h
@@ -52,6 +52,7 @@ public:
     QString name;
     QString realname;
     QString email;
+    QString lastLogin;
     Error error;
     int id = -1;
     bool bot = false;
@@ -82,11 +83,34 @@ public:
     PageInformation pageInfo;
 };
 
+class Event
+{
+public:
+    QString action;
+    QString targetType;
+    QString targetTitle;
+    QString timeStamp;
+    QString pushData;
+    User author;
+    Error error;
+
+    QString toMessage() const;
+};
+
+class Events
+{
+public:
+    QList<Event> events;
+    Error error;
+    PageInformation pageInfo;
+};
+
 namespace ResultParser {
 
 User parseUser(const QByteArray &input);
 Project parseProject(const QByteArray &input);
 Projects parseProjects(const QByteArray &input);
+Events parseEvents(const QByteArray &input);
 Error parseErrorMessage(const QString &message);
 
 } // namespace ResultParser